Preparation of expandable styrene polymers

Details Preparation of expandable styrene polymers Preparation of expandable styrene polymers

C - Chemistry, Metallurgy

08

J

403/64

C08J 9/20 (2006.01)

Patent

CA 2029208

_ 9 _ O.Z. 0050/41218 Abstract of the Disclosure: In the preparation of ex- pandable styrene polymers by polymerizing styrene, if desired together with up to 50% by weight of other monomers, in aqueous suspension with addition of a C3- to C6-hydrocarbon as blowing agent and, if desired, conven- tional additives in effective amounts before, during or after the polymerization, foaming is reduced if the aqueous phase contains from 0.05 to 0.3% by weight of polyvinylpyrrolidone having a K value of from 100 to 150 as protective colloid.

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